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Standard XII

Chemistry

Properties of Alpha, Beta and Gamma Rays

An alpha part...

Question

An alpha particle is

An electron

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One neutron and one proton

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Two protons and two neutrons

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An X-ray emission

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Solution

The correct option is C Two protons and two neutrons

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Similar questions

Q. You tell me that An alpha particle is just a helium nucleus without any electrons -- two protons and two neutrons. But well ruther Ford was experimenting the gold foil experiment that time neutron was not discovered so how they get that Alpha particle is made up of 2 protons and 2 neutrons

Q. A nitrogen nucleus

_{7}^{14} N

absorbs a neutron and can transform into lithium nucleus

_{3}^{7} L i

under suitable conditions, after emitting:
(i)

4

protons and

3

neutrons
(ii)

5

protons and

1

beta particle
(iii)

2

alpha particles and

2

gamma photons
(iv)

1

alpha particle,

4

protons and

2

beta particles
(v)

4

protons and

4

neutrons.

Q. Assertion :An atom on losing an

α

-particle forms its isodiapher. Reason: Isodiaphers are the elements having same difference in their neutrons and protons.

Bombardment of aluminium of α-particle leads to its artificial disintegration in two ways (i) and (ii) as shown below. Product X, Y, and Z, respectively, are

$_{14} S i^{30} + X (i) \leftarrow_{13} A l^{27} (i i) \to_{15} P^{30} + Y \to_{14} S i^{30} + Z$

(IIT-JEE, 2011)

Q. A free neutron decays to a proton but a free proton does not decay to a neutron. This is because
(a) neutron is a composite particle made of a proton and an electron whereas proton is a fundamental particle
(b) neutron is an uncharged particle whereas proton is a charged particle
(c) neutron has large rest mass than the proton
(d) weak forces can operate in a neutron but not in a proton.

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